Side-slipping weft detector



Dec. 3, 1929. Q v, PAYNE 1,738,198

SIDE SLIPPING WEFT DETECTOR Filed June 21, 1927juulllllllllllllllHIIIMIIIINNIIIUIII lil g liti lill

Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE @SCAR V. PAYNE, 0F.WORCESTER, MASSACHUSETTS, ASSIGNOB T0 C IROIVIIPTN t KNOWLES LOOM WORKS,WORCESTER, MASSACHUSETTS, A CORPORATION F MASSACHUSETTS SIDE-SLTPIPINGWEET DETECTOR Application filed. June 21,

This invention relates to improvements in so-called side slip weftdetectors for looms and it is the principal object ofthe invention tosimplify the construction of feelers of should take place such asstopping or re plenishment of weft. The first detector ofl this kind ofwhich I have knowledge isb that shown in patent to Sameck No. 718,529isn sued Jan. 13, 1903. rThis patent shows a spring pressed slide onwhich is pivotally mounted a detector element with a' toothed yarnengaging surface offset from the pivot of the detected element so thatwhen the detector is struck by the surface being detected the lattertends to move the detector about its pivot. 1With the Sameckconstruction a second and relatively light spring is necessaryto returnthe detecting element to normal position after a swingingor angularmovement about the pivot incident to detection of weft exhaustion.` ltis an important object of my present invention to employ the generalconstruction shown in the Sameck patent but to restore the movingdetector parts to normal position by a single resilient y element actingdirectly on the detector.

When detectors are employed with multicolor weft replenishing mechanismsthey are ordinarily located on Athe magazine side of the loom and musttherefore be withdrawn fromy the path of the incoming bobbin at the timeof transfer. It is a further'object of my i invention to provide asliding support for the detector which shall have a portion eX- tendingin the path of the transfer mechanisni so that said detector may bemoved to aposition of safety when the shuttle is being replenished.

Multicolor weft replenishing mechanisms ordinarily employ a verticallymoving floating actuator lever which usually cooperates with acontroller pin normally in the path of the actuator lever. When such acon- 1927. Serial No. 200,481.

struction is applied to a dobby loom' it is` found that falseindications may result when the loom is being turned over by hand due.to the fact that the controller pin is normally 1n a position tointerrupt the downward movement of the actuator lever. lt is a stillfurther object of my present invention to pro-- vide a controller forthe floating actuator lever which is normally out of the path of saidlever, said controller being moved under the lever at the time ofindication of weft exhaustion. The movement ofthe controller mayconveniently be effected by the angular movement of the detector member.

With these and other objects in view which `will appear as thedescription proceeds, my

invention resides in the combination and arrangement of partshereinafter described and set forth in the claims.

ln the accompanying drawingswherein a convenient form of the inventionis shown,

Fig. 1 is a top plan view of a detector made according to my presentinvention showing the same in contact with a sufficient. supply of weftand moved forwardly without givingv indication of weft exhaustion,`

Fig-2 is a side elevation looking in the directionof arrow ,2, Fig. l,parts lacing shown in section,

' Fig. 3 is a vertical section on line 3--8 of Fig. 1 showing the partsinl non-indicating position in full lines and ind indicating position indotted lines,

4 is a view similar to Fig. 1 but with the detector moved along adenuded loobbin to indicate weft exhaustion,

Fig. 5 is a detail front elevation taken in the direction of arrow 5;Fig. l',

Fig. 6 is a detail'vertical section Online 6-6 of Fig. 2,

Fig. 7 is a side elevation of the detector ed a feeler stand 1() havinga horizontally disposed platformll and having also an upstanding horn 12provided with a slot 13 in which is located one end of a iioatingaetuator lever 14. Said lever is moved downwardly on each detecting beatof the loom when the lay is in extreme forward position and ifuninterrupted permits continued operation of the loom without change but1f interrupted will initiate replenishment, as shown in patent to RyonNo. 1,030,748. The

platform may have a slot l5 for a purpose to be described.

In carrying my improvements into 'effect I provide a fixed feeler casinghaving a lower bed portion 20 and a cap 21. Said bed and cap areprovided with aligning slots indicated at 22 in Fig. 1 to receive a bolt23 which also extends through slot 15 by means of which the casing isheld in proper angular position on the platform 11. The bed is providedwith a groove 24 running preferably the whole length of the bed andextendin rearwardly toward the lay of the loom an said bed is furtherprovided with a longitudinal pocket 25 which lies parallel to the roove24. The bed has a small rib 26 at the orward end of pocket 25 and mayalso have another rib 27 at the rear end ofthe pocket, although thisrear rib is not essential. A partition 2 8 extends between the grooveand pocket and serves to separate parts of the detector to be describedhereinafter. The upper forward surface of the bed has a relatively largebearing surface 29 and'preferably though not necessarily a smallerbearing surface 30 at the same level. A portion of the partition 28 mayalso be in the same horizontal plane asthe surfaces 29 and 30. The rearpart of the upper surface of the bed surrounding the groove and pocketmay be at a lower level than surfaces 29 and 30, as at 31.

A detector supporting and guiding carrier 32 is slidably mountedin thegroove 24 and has the forward end thereof bent upwardly as at 33 toextend into the path of an arm 34 formed on the transferrer lever 35.The purpose of this construction is to move the slide 32 forwardlywhenever the transferrer arm has a transferring movement.

The detector 40 is formed preferably of a single pieceof sheet metalhaving the rear end thereof notched as at 41 and having the intermediateportion thereof provided with an arm 42 the forward side of which has alug 43 lying at one side of a pivot stud 44 extending upwardly from thecarrier slide 32. Said stud 44 forms the pivot about which detector 40swings and movement of the latter in a counter-clockwise direction islimited by stop in'45 carried by the slide 32 (to engage tail 46 of thedetector 40.

The cap 21 has a pocket 47 which lies over the pocket 25 of the bed 20and ribs 48 and 49 at the front and rear, respectively, of the capdefine the ends of the pocket 47. Said cap has bearing portions 50 whichrest on the corresponding bearing 29 on the bed and has an aperture 51,see Fig. 7, through which the detector extends, said aperture lyingabove the lowered surface 31. The 'cap is further provided with a tongue52, see Fig. 6, which enters the rear end of groove 24 to cooperate withbolt 23 to hold the cap and bed in fixed'relation. The ca J may alsohave adownwardly facing flat earing 53 to lie close to the top of thedetector and prevent the sameirom moving upwardly off the pivot stud 44.Upbent end 33 of the slide carrier engages the forward end of the capalnd thus limits rearward movement of said s ide.

The means for holding the slide carrier and detector in rear position isshown herein as a compression spring 54 lying in the space defined bythe pockets 25 and 47. The forward end of the spring bears against oneor both of ribs 26 and 48, while the rear end pushes directly againstthe detector and is held in position by the lug 43. The pockets confinethe spring and require the same to exert its pressure against thedetector.

The indicating means includes a weighted lever 60 pivoted as at 61 to adepending arm 62 formed on the stand 10. Said indicating lever has anupwardly extending controller 63 which, as shown in Fig. .3, is normallyheld out of the path of the lever 14 by weighted arm 64. Said controller63 lies normally in position to be acted upon by the indicating tail 46of the detector and that edge of said tail adjacent the arm 63 isparallel to the direction in which the slide 32 moves so that back andforth movement of the detector will not disturb the indicating lever 60on non-indicating detecting beats of the loom.

In operation the advancing supply of weft B in shuttle S will engage thedetector and if sufiicient yarn be present the detector will moveforwardly as indicated in Fig. 1, conipressing spring 54 and leaving theindicating lever 60 in the position shown in full lines in Fig. 3. Asthe lay reeedes the spring will expand and push the detector rearwardlybut inasmuch as the detector is limted in its movement relatively to theslide 32 by pin 45 said slide carrier will also be moved rearwardly bythe spring. Uien the supply of weft is exhausted, however, the detectorwill move to the angular position indicated' in Fig. 4 because of thefact that the yarn engaging portion 41 of the detector is offset fromthe pivot stud 44, and the spring pushes on the detector between thepivot of the latter and the yarn engaging part of the detector. Underthese conditions the slide carrier 32 remains at rest, being held inthis position by the spring 54. As said detector swings on its pivotalong thc denuded bobbin the tail 46 will move the indicating lever fromthe full to the dotted line position shown in Fig. 8, thus interruptingthe downward movement of the actuator lever lll. On the subsequenttransferring beat of the loom the arm 34 will engage the upright portion33 of the slide 32 to move thel 8. This latter construction may also beused on weft replenishing looms, the extended end 33 serving under suchconditions merely to withdraw the feeler.

From the foregoing it will be seen that I have provided a weft detectorwherein the yarn engaging part and the sliding support are bothcontrolled by a single resilient element. It will further be seen that-the'sliding carrier not only affords pivotal mounting for the detectorbut also limits angular movement thereof in one direction and that theupright portion 33 of the slide engages the cap to limit rearwardmovement of said slide, said upright portion being bendable ifdesired toafford slight adjustment of the rear location of the detector. It willfurther be seen that the forwardly extending tail of the detector isnormally spaced from the rocking controller as set forth in Figs. l and2, the purpose of this construction being to permit -a slight sidemovement of the detector without causing vibration of the controller.Furthermore, the tongue on the cap enters the groove for the slidingcarrier and thus assists in aligning the cap and bed. Also, the rearupper surface of the bed islower than the top of the sliding carrier andthe bottom of the'detector, the purpose of this construction being toavoid the precise machining operations which would be necessary if thedetector had to rest on the bed as well as the carrier. Said slidingcarrier also is provided with a portion lying in the` path of some partof the transfer mechanism whereby the detector may be moved out of thepath of the incoming supply of weft at the time of transfer. It willalso be seen that the base and cap are provided Awith grooves whichdefine a retaining space for the resilient element. lVhile I havedescribed the slide as the support for the detector and prefer to usethe slide in this connection vet an important function of said slide isto guide the'detector in its movements toward and from the lay. stockand is therefore substantial but at the same time is found to besufficiently light to The detector made of fiat.

operate successfully on very fine yarn such as rayon and raw silk.

A further advantage of my present invention is that adjustment of thefeeler as a whole toward and from the surface being detected can be madewithout a corresponding adjustment of the controller for the actuatinglever. This` is because of the fact that the tail of the detectornormally moves forwardly in the line of the adjustment on non- 1indicating detecting beats of the loom and is brought about by the factthat the tail moves to actuate the controller in al directionsubstantially parallel to the surface being detected and at right anglesto the normal forward movement of the supporting sliding carrier.

Having thus described my invention it will be apparent that changes andmodifications -ma-y be made therein by those skilled in the are withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to the details herein disclosed, but what I claim is:

l. In a side slipping weft detector for looms, a stationary support, asliding carrier movable toward and fromthe front of the loom in saidsupport, a detector pivotally mounted on the sliding carrier andsupported thereby, said detector having a yarn engaging portion offsetfrom 'the said carrier to move along and in contact with a substantiallyexhausted supply of weft to give indication of weft exhaustion, and asingle resilient element interposed between a por- '.tion of the fixedstand and the detector, said 2. In a side slipping weft detectorforlooms, a fixed stand, a sliding carrier movable toward and from thefront of the loom in said stand, a side slipping weft detector pivotallyconnected to the carrier and having a yarn engaging surfacev offset fromthe pivotal connection with the carrier and capable at exhaustion ofweft to move along the exhausted supply in the direction of the lengthof the surface being detected away from the pivotal connection, a singleresilient element interposed between the fixed stand and the detectorand exerting a force on the latter tending to move the same about thepivotal connection between said detector and sliding carrier, and meansto limit relative angular movement between the detector and the carrierboth the detector and carrier being moved rearwardly due solely to theaction of the resilient element. I

3. In a side slipping weft detector for looms, a'fixed stand, a slidingcarrier movllG able in said stand toward and from' the front of theloom, a weft detector pivotally mounted on the sliding carrier andhaving a yarnpengaging detecting surface offset from its ivot in thedirection of the length of the sur ace to be detected, and a singleresilient detector and carrier positioning member acting between a partof the fixed support and a portion of the weft detector and exertingyielding pressure on said detector at a point between the yarn engagingdetecting surface and the pivotal' connection between the detector andcarrier with respect to the length of the surface to be detected, thecarrier and detector moving rearwardly after a non-indicating detectingmovement un-der the sle action of the resilient means and said resilientmeans also moving said detector angularly With respect to the carrier tonormal position after indicating movement.

4. In a side slipping weft detector for looms, a fixed stand, a slidingcarrier movably mounted in said stand to move toward and from thesurface to be detected, a weft detector pivotally mounted on the slidingcarrier and having a detecting surface offset from the .pivotalconnection with the carrier in the direction of the length of thesurface to be detected, stop means to limitV angular' movement betweenthe detector and carrier in one direction, and a single carrier anddetector moving element to act on the detector at a point between thedetecting surface thereof and the ivotal connection between the detectorauf-the carrier and tending to hold the detector against said stop meansto position the detector for engagement with the surface to be detected,said single carrier and detector returning-element applying prcssure tothe detector at a point intermediate the detecting surface and the pivotof the detector with respect to the length of the surface to bedetected, both .the detector and carrier being moved rearwardly duesolely to the action of the resilient ele- 5. Ih a side slipping weftdetectoro for looms, a fixed stand, a sliding carrier movable in thestand toward and from the sur- "face to Vbe detected, a side slippingweft' detector pivotally mounted on the sliding carlrier said detectorslidin at exhaustion of weft in a direction away from pivotal mounting fthe detector, a stop on the carrier to enga-ge thedetector-and limitangular movement thereof with respect to the carrier in one direction,means to limit movementof @the carrier toward thesurface to be detected,

6. In a sidev slipping weft detector for looms, a fixed stand having aspring receiving pocket located entirely in the stand, a sliding carriermovable in the fixed stand toward and from the surface to be detectedand having a portion to engage the fixed stand' to limit movement ofsaid carrier toward the surface to be detected, a weft detectorpivotally mounted on the carrier and having a detecting surface offsetfrom thc pivotal connection with the carrier in the direction of thelength of the surface to be detected, a'stop on the carrier to engageand limit angular movement of the detector, and a compression springconfined in the pocket in the fixed stand, the forward end of saidspring bearing against the fixed stand and the rear end of said springbearing directly against the detector at a point intermediate thedetecting surface thereof and the pivotal connection between thedetector and carrier with respect to the length of the surface beingdetected, said spring yieldingly holding the detector againstthe stopand the carrier in rearposition.

7. In a side slipping weft detector for looms,a fixed stand, a carriermember slidably mounted in the fixed stand toward and from the surfaceto be detected, a detector member pivotally mounted on the Carriermember and having a detecting surface offset from the pivot thereof inthe direction of the length of the surface to be detected, a stop on oneof said members to engage the other to limit relative angular movementof said members in one direction, and a single resilient device exertingyielding pressure against the detector member at a point intermediatethe detecting surface and the pivotal connection between the members,the members being held in normal angular position and the carrier memberbeing held yieldingly toward the surface to be detected solely by theaction of the single resilient device.

8. In a side slipping weft detector for looms, a fixed stand having apocket therein extending toward and from kthe surface to be detected, acarrier slideably mounted on the stand toward and from the surface to bedetected, a weft dector pivotally mounted on the carrier, and acompression spring located in the pocket and confined thereby andexerting rearward yielding pressure against the detector at one side ofthe pivotal connection between the detector and carrier to hold saiddetector and carrier in rearward position and to restore said detectorto normal position after an indicating movement.

9. In a side slipping weft detector for looms, a fixed stand having apocket formed entirely therein extending toward and from the surface tobe detected, a carrier slidably mounted in the stand and extendingsubstantially parallel to the pocket, a weft detector pivotally mountedon the carrier and having a detecting surface offset from the pivotalconnection in the direction of the length of the surface to be detected,and a compression spring located in the pocket and exerting yieldingpressure against the detector at a point intermediate the detectingsurface and the pivotal connection between the-detector and carrier withrespect to the length of the surface to be detected, said spring holdingthe carrier yieldingly toward the surface to be detected and also actingto move the detector to normal position after an indicating movement.

10. In a side slipping weft detector for looms, a xed stand comprising abed and a cap, the bed and cap each having pockets extending toward thesurface to be detected and said pockets aligning to define asubstantially closed chamber, a carrier extending substantially parallelto the chamber and slideably mounted on said stand toward and from thesurface to be detected, a weft detector pivotally mounted on the carrierand having a portion extending across the chamber, and a compressionspring located in and confined by the chamber and exerting pressureagainst that portion of the detector extending across the chamber tohold said detector and carrier yieldingly in rear position and torestore said detector to normal position after an indicating movement.

11. ln a side slipping weft detector for looms, a fixed bed having agroove therein substantially perpendicular to the surface beingdetected, a carrier member slideably mounted in the groove to movetoward and from the surface to be detected, a side slipping weftdetector pivotally mounted on the sliding member and having an offsetyarn engaging surface, a fixed cap having a tongue to enter the grooveand position the cap with respect to the bed, and single resilient meansinterposed between the cap and bed and engaging a detector to exertpressure on the same tending to hold' the slide and detector yieldinglytoward the surface to be detected.

12. ln a side slipping weft detector for looms, a fixed support, acarrier member mounted on the support for sliding movement with respectthereto toward and from the surface to be detected, a weft detectorpivotally mounted on the slide and having a yarn engaging portion offsetwith respect to the pivotal connection, a single resilient meansengaging the detector and holding said detector and carrier yieldinglyin rearward position toward the surface to be detected, and transfermechanism, a portion of said Carrier member being extending into thepath of the transfer mechanism whereby said transfer mechanism iseffected to move the carrier member and the detector forwardly on atransferring beat of the loom against the action of the single resilientmember.

13. In a side slipping' weft detector for a tionary support, a carrierslidable with respect to the support in a direction toward and from thesurface to be detected, a side slipping detector element pivoted to thecarrier and having a yarn engaging detecting surface offset from thepoint of -pivotal connection with the carrier in the direction of thelength of the surface to be detected, and a single re silient'memberinterposed between the support and the detector and acting to move thecarrier toward the surface to be detected after a non-indicatingdetecting beat of the loom, said detector being movable pivotally withrespect to the carrier against the action of the resilient member, thelatter acting to move the detector angul'arly relatively to the carrierto restore said detector to normal position after a detecting angularmovement.

14. In a side slipping weft detector for a loom having a surface to bedetected, a stationary support, a carrier slidable with respect to thesupport in a direction toward and from the surface to be detected, aweft detector pivotally mountedpn the carrier, and a single resilientelement to restore said carrier and detector to normal rearward positionafter non-detecting and also indicating detecting beats of the loom,said resilient element being operatively connected to the detector andbeing operatively connected at a relatively fixed point, said resilientelement tending throughout the entire forward movement of the carrier toeffect angular Inovement of the detector relatively to the carrier onindicating beats of the loom, said resilient element being the solemeans for restoring the carier and detector to normal position.

15. In a side slipping weft detector for a loom having a surface tofbedetected, axed support, a carrier slidable in a direction toward andfrom the surface to be detected and relatively to the support, adetector pivotally mounted to the carrier and having a yarn engagingsurface offset in a direction of the length of the surface to bedetected with respect to the pivotal connection between the detector andcarrier, and a single resilient element constituting the sole means torestore the lcarrier and detector to normal position after bothnon-indicating and also indicating detecting beats of the loom, saidresilient element being interposed between the detector and the supportandrhaving an increasing tendency to resist angular movement of thedetector relatively to the carrier during the forward movement of thecarrier on a nondetectable beat of the loom. p

16. In a loom, an actuator to effect a change in the operation of theloom, a detector stand, a controller for said actuator pivotally mountedon said stand and having its free upper end movable away from said standin a direction substantially parallel to the surface being detected andtoward said actuator, a

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i. sliding carrier movable on said stand in a. path adjacent saidcontrollery and toward and from the surface being detected, a side slipweft detector pivoted to the sliding carrier and having a yarn-engagingportion olset from the pivotal connection of said detector- With thecarrier and in the direction of the length of the surface beingdetected, said detector having a portion receiving a component 10 ofmovement in a direction substantially parallel to the surface beingdetected when said detector has a movement indicating substantial weftexhaustion, said portion thereby directly engaging said controller andmoving the same about its pivot on said stand into operative relationwith respect to ghe actuator.

. 17. In a loom, an actuator to elect a change in the operation of theloom, a detector stand,

a controller for said actuator pivotallyT mounted on said stand andhaviligits free upper end movable away from said stand in `a directionsubstantially parallel to the surface being detected and toward saidactuator,

.a counterweight ei'ective to hold said controller normally free fromsaid actuator, a slidingf carrier movable on said,stand in a path adjacent said controller and tovvard and from the surface being detected, aside slip weft detector pivoted to the sliding carrier and having ayarn-engaging portion movable in the direction of the length of thesurface being detected, said detector having al portion directlyengaging said controller nd'moving the same about its pivot on saidstand into operative relation with respect to the actuator.

In testimony whereof I` have hereunto affixed my signature.

l OSCAR V. PAYNE. 40

